Clinical trials: Orthostatic Intolerance
Postural Orthostatic Tachycardia Syndrome (POTS)
The Renin-Aldosterone Axis in Postural Tachycardia Syndrome
The purpose of this study is to determine the role of the renin-angiotensin-aldosterone in the pathophysiology of postural tachycardia syndrome, and to provide an insight about the disease process in this disorder.
- Trial name
- NCT00962949
- Testing
- Angiotensin II
- Where
- United States
- Volunteers
- 28 people, healthy volunteers welcome
- Sponsor
- Vanderbilt University Medical Center
Postural Orthostatic Tachycardia Syndrome
Dietary Salt in Postural Tachycardia Syndrome
Patients with POTS may not adequately expand their plasma volume in response to a high-sodium (Na+) diet. Mechanisms involved in the regulation of plasma volume, such as the renin-angiotensin-aldosterone system and renal…
- Trial name
- NCT01547117
- Testing
- Blood Volume, Total Blood Volume, Exercise Capacity Test - Bicycle
- Where
- United States
- Volunteers
- 38 people, healthy volunteers welcome
- Sponsor
- Vanderbilt University
Postural Orthostatic Tachycardia Syndrome
Dietary Sodium's Effect on Urinary Sodium and Dopamine Excretion in Patients With Postural Tachycardia Syndrome
Patients with Postural Tachycardia Syndrome (POTS) may not adequately expand their plasma volume in response to a high sodium diet.
- Trial name
- NCT01563107
- Testing
- Plasma Volume, Exercise Capacity Test - Bicycle, Posture Study
- Where
- United States
- Volunteers
- 38 people, healthy volunteers welcome
- Sponsor
- Vanderbilt University Medical Center
Postural Tachycardia Syndrome, Orthostatic Intolerance
Peripheral Dopamine in Postural Tachycardia Syndrome
The purpose of the proposed research is to determine how changes in kidney dopamine (DA) activity influence urinary sodium excretion.
- Trial name
- NCT00685919
- Testing
- Carbidopa
- Where
- United States
- Volunteers
- 32 people, healthy volunteers welcome
- Sponsor
- Vanderbilt University
Orthostatic Intolerance
Sex Hormones and Orthostatic Tolerance
This study is designed to determine the causes of "orthostatic intolerance" which occurs more commonly in women than in men. Orthostatic tolerance is the ability to remain standing up right for long periods of time, or to avoid…
- Trial name
- NCT01153581
- Testing
- Ganirelix acetate, 17β-Oestradiol, Progesterone
- Where
- United States
- Volunteers
- 109 people, healthy volunteers welcome
- Sponsor
- Yale University